If you’re hoping to get lost in the rain on your romantic getaway, check out these details about year-round temperatures in Les Hauts-Geneveys: The hottest months are usually July and August with an average temp of 60°F, while the coldest months are January and February with an average of 34°F. The rainiest months in Les Hauts-Geneveys are June, May, December, and July, with each month seeing an average of 7 inches of rainfall.